THE ORDERS OF MAMMALS 



433 



FIG. 301. A beaver dam. 



(Photo, furnished by American Museum of Nat- 

 ural History.) 



The members of the pocket-gopher family possess large cheek 

 pouches, which open outside of the mouth, and strong fore feet 

 provided with large claws suitable for digging (Fig. 302) . Grain 



2 F 



